380 Wortman — Studies of Eocene Mammalia in the 



base for articulation with the xipliisterrmm. This decided 

 marsupial aspect of the sternum adds but another character, to 

 the already full list of osteological features in which the two 

 groups resemble each other. 



Fore Limb. — The scapula bears a general resemblance to 

 that of the felines. A prominent spine divides the external 

 surface into two subsequent fossae, and terminates proximally 

 in a rather short blunt acromion. The metacromion is not a 

 distinct process, as in the cats, but consists of a more or less 

 distinct lamina overhanging the glenoid border. The neck of 

 the bone is relatively longer than that of either the dog or the 

 cat. The glenoid cavity is oval and rather shallow, and the 

 coracoid is small. The coracoid border is much curved and is 

 interrupted by a very wide superscapular notch. The glenoid 

 border is straight and much thicker than the coracoid border. 

 The area for the origin of the teres major is very distinct, 

 being separated by a well-defined ridge from the main part of 

 the posterior fossa. 



Lying immediately beneath the glenoid cavity, imbedded in 

 the matrix, was found a small splint-like bone, which without 

 doubt represents the clavicle ; it apparently has an articular 

 surface at one end, probably for contact with the acromion. 

 The bone is broken so as not to display its full length, but, 

 judging from its size, it is hardly probable that it reached the 

 manubrium. It appears to resemble the clavicle of the Dasyure 

 more than that of any of the living Carnivores. 



The humeri are both considerably crushed in the proximal 

 half of their extent, and, on this account, do not display the 

 characters of this region very distinctly. The head is very 

 convex from before backward and somewhat pointed behind. 

 The greater tuberosity is prominent and extends above the 

 level of the head ; the postero-external border is drawn out 

 into a broad laminate process, which reaches well backward. 

 The lesser tuberosity is prominent, and there is a broad shallow 

 bicipital groove. The character of the deltoid crest is much 

 obscured on account of the crushing, but it appears to be con- 

 siderably reduced from the more primitive Creodont condition. 

 The distal end resembles that of the dog more closely than that 

 of any other living mammal ; it is much compressed from side 

 to side — more so than in the dog, — the external condyle is little 

 protuberant, and the supinator ridge is much reduced. The 

 internal condyle projects behind and slightly below the edge of 

 the trochlea, and is separated from it inferiorly by a deep notch. 

 The anconeal and anticubital fossae are very deep, and are 

 placed in communication with each other by means of a large 

 supertrochlear foramen. There is no entepicondylar foramen. 

 The distal articular surface is divided by a very distinct 

 rounded ridge into capitular and trochlear portions, both of 



